*{
    margin:0;
    padding:0;
}
a{
    text-decoration: none;
}
li{
    list-style: none;
}
.tb_promo{
    width: 846px;
    height: 472px;
    position: relative;
    left: 50%;
    margin-left: -423px;
    top:50px;
    background-image: url(/Comprehensive_Exercise/TaobaoPromo/images/02.png);
    background-size: cover;
    border-radius: 10px;
}

.prev{
    width: 30px;
    height: 50px;
    position: absolute;
    top:236px;
    margin-top: -25px;
    left:0;
    color:#F7F9FA;
    font-size: 16px;
}
.prev>a{
    text-align: center;
    line-height: 50px;
    margin: 10px;
}
.prev:hover{
    border-radius: 0 50% 50% 0;
    background-color: rgba(0,0,0,0.1);
}

.next{
    width: 30px;
    height: 50px;
    position: absolute;
    top:236px;
    margin-top: -25px;
    right:0;
    color:#F7F9FA;
}
.next>a{
    text-align: center;
    line-height: 50px;
    margin: 10px;
}
.next:hover{
    border-radius:  50% 0 0 50% ;
    background-color: rgba(0,0,0,0.3);
}
ul{
box-sizing: border-box;
width: 70px;
height: 13px;
background-color: rgba(255,255,255,0.4);
position: absolute;
left:423px;
margin-left: -35px;
bottom:30px;
border-radius: 7px;
}
ul>li{
   float: left;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #fff;
    text-align: center;
    line-height: 12px;
    margin:2px;
}
li:hover{
    background-color: #ff5000;
}

.aside{
    width: 90px;
    height: 320px;
    position:fixed;
    top:236px;
    margin-top: -160px;
    right:0;
    background-color: #F7F9FA;
    border-radius: 10px 0 0 10px;
    border:1px solid #555;
    padding: 3px;
}
.message{
    width: 90px;
    height: 80px;
    text-align: center;
}
.message>img{
  width: 70px;
  height: 50px;
  text-align: center;
  line-height: 50px;
  margin:0 10px
}

.ocupy{
    width: 1000px;
    height: 1000px;
    background-color: pink;
    margin-top: 100px;
}
